Theory

CH8 - REACTION KINETICS

(a) The reaction between iodide ions and persulfate ions, $S_2O_8^{2-}$, is slow.$$2I^- + S_2O_8^{2-} \longrightarrow I_2 + 2SO_4^{2-} \quad 1$$The re...

2009 Summer

MCQ

CH8 - REACTION KINETICS

Four reactions of the type shown are studied at the same temperature.$X(g) + Y(g) \rightarrow Z(g)$Which is the correct reaction pathway diagram for t...

2009 Winter

Theory

CH8 - REACTION KINETICS

(a) Explain, using diagrams where appropriate, the types of interaction responsible for the primary, secondary and tertiary structure of a protein.pri...

2009 Winter

MCQ

CH8 - REACTION KINETICS

Na_2S_2O_3 reacts with dilute HCl to give a pale yellow precipitate. If 1 cm^3 of 0.1 mol dm^{-3} HCl is added to 10 cm^3 of 0.02 mol dm^{-3} Na_2S_2O...

2010 Summer

MCQ

CH8 - REACTION KINETICS

Na₂S₂O₃ reacts with dilute HCl to give a pale yellow precipitate. If 1 cm³ of 0.1 mol dm⁻³ HCl is added to 10 cm³ of 0.02 mol dm⁻³ Na₂...

2010 Summer

Theory

CH8 - REACTION KINETICS

The diagram below shows, for a given temperature T, a Boltzmann distribution of the kinetic energy of the molecules of a mixture of two gases that wil...

2010 Summer

Theory

CH8 - REACTION KINETICS

Phenacyl chloride has been used as a component of some tear gases. Its lachrymatory and irritant properties are due to it reacting with water inside b...

2010 Summer

Theory

CH8 - REACTION KINETICS

Phenacyl chloride has been used as a component of some tear gases. Its lachrymatory and irritant properties are due to it reacting with water inside b...

2010 Summer

MCQ

CH8 - REACTION KINETICS

The diagram represents the Boltzmann distribution of molecular energies at a given temperature. Which of the factors that affect the rate of a reactio...

2010 Winter

MCQ

CH8 - REACTION KINETICS

The diagram represents the Boltzmann distribution of molecular energies at a given temperature. Which of the factors that affect the rate of a reac...

2010 Winter

Theory

CH2 - ATOMIC STRUCTURE

Fig. 1.1 shows how first ionisation energies vary across Period 2.(a) Construct an equation to represent the first ionisation energy of oxygen. Includ...

2022 Spring

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Some oxides of elements in Period 3 are shown.$\text{Na}_2\text{O}$\hspace{1cm}$\text{Al}_2\text{O}_3$\hspace{1cm}$\text{P}_4\text{O}_6$\hspace{1cm}$\...

2022 Spring

Theory

CH11 - GROUP 17

The hydrogen halides HCl, HBr and HI are all colourless gases at room temperature.(a) The hydrogen halides can be formed by reacting the halogens with...

2022 Spring

Theory

CH18 - CARBONYL COMPOUNDS

Compounds J and K are found in plant oils.[Image_1: Illustration of compounds J and K]Fig. 4.1(a) (i) Complete Table 4.1 to state what you would obser...

2022 Spring

Theory

CH7 - EQUILIBRIA

Iodine is found naturally in compounds in many different oxidation states.(a) Iodide ions, $\text{I}^-$, react with acidified $\text{H}_2\text{O}_2$(a...

2022 Spring

Theory

CH5 - CHEMICAL ENERGETICS

Silicon is the second most abundant element by mass in the Earth's crust.(a) In industry, silicon is extracted from SiO$_2$ by reaction with carbon at...

2022 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Titanium is a transition element in Period 4. It is commonly found as TiO2 in minerals.(a) (i) Define transition element.................................

2022 Spring

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Compounds F and J are shown in Fig. 4.1.Fig. 4.1(a) F and J both contain the arene functional group.(i) Identify...

2022 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

2-Chloropropanoic acid, CH₃CHClCOOH, is used in many chemical syntheses.(a) (i) An equilibrium is set up when CH₃CHClCOOH is added to water. Write...

2022 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Lidocaine is used as an anaesthetic. A synthesis of lidocaine is shown in Fig. 6.1.(a) W can be formed by reacting HOCH$_2$COOH with an excess of SOCl...

2022 Spring